Elon Musk, Tesla Inc's (TSLA.O) chief executive, testified on Friday that investors do not always react to his Twitter messages as he expects, defending himself in a fraud trial over his 2018 tweet that he had funding to take the electric carmaker private.

Twitter owner Elon Musk on Monday opened fire against Apple over its tight control of what is allowed on the App Store, saying the iPhone maker has threatened to oust his recently acquired social media platform.